Designed for business owners with good credit scores, the Platinum Business Card from American Express is ideal for the small business owner planning as this card allows users to pay outstanding balances over a period of time.

For those who qualify, interest rates for new purchases with the card are reasonably low, while balance transfers are fixed at 4.99%. Additionally, a twelve-month long 0% introductory rate applies for new purchases. No annual fees are charged, which also applies to two additional supplementary cardholders. However, there is a $10 annual fee charge for the third supplementary cardholder.

As with most other platinum credit cards, a comprehensive insurance plan that includes a purchase protection plan is included as a feature of American Express cards. Apart from that, American Express Platinum Business cardholders also get to receive special discounts and savings at participating merchants such as Hertz, FedEx, AT&T, Staples and 1-800-FLOWERS.COM.

With the American Express Platinum Business Card, cardholders are provided access to the American Express' Small Business Network. Through the Network, small business owners everywhere can manage their account online through the Small Business Dashboard, and even communicate with other small business owners through Community Chat to gain new insights or to promote their businesses. In addition, cardholders can also gain expert advice and read articles posted by other business owners through this portal.

What's more, those who apply for membership also gain access to the American Express Membership Rewards Program. As a cardholder, every dollar spent earns 1 point and accumulated points can be redeemed gifts, services and experiences. The best thing about the Membership Rewards Program is that there is no limit to the amount of points that can be earned, and the points never expire.

All in all the American Express Platinum Business Card is an excellent choice of a credit card for the small business owner. The only drawback is the exclusive approval process which means that not all cardholders will get the lowest possible APR.